738.38% is the change from 99 to 830
Calculation steps:
[( 830 - 99 ) ÷ 99] x 100 = 738.38%
Formula
Percentage change = [(830 - 99) / 99] x 100
Subtract the new number by the original number
830 - 99 = 731
731 ÷ 99 = 7.383838383838384
7.383838383838384 x 100 = 738.38%